<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>选择器分组</title>
<style type="text/css">
h1,h2,h3{
	color: pink;
}
</style>
</head>
<body>
<div>
	<h1>我是h1</h1>
	<h2>我是h2</h2>
	<h3>我是h3</h3>
</div>
</body>
</html>